Adhesion and weathering performance of waterborne coatings applied to different temperate and tropical wood species / Jan van den Bulcke in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 3 (07/2006)

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 3 (07/2006) . - p. 185-191 Titre : Adhesion and weathering performance of waterborne coatings applied to different temperate and tropical wood species Type de document : texte imprimé Auteurs : Jan van den Bulcke, Auteur ; Marc Stevens, Auteur ; Joris van Acker, Auteur ; Veerle Rijckaert, Auteur Année de publication : 2006 Article en page(s) : p. 185-191 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Bois -- Revêtements protecteurs Chimie des surfaces Conifères Etudes comparatives Haut extrait sec Polyacryliques Polyalkydes Revêtements -- Détérioration:Peinture -- Détérioration Revêtements -- Effets de la température:Peinture -- Effets de la température Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Wood is a renewable material that has been recognized for a long time as a valuable material for construction and engineering. Sound, solid wood can last for centuries. Nevertheless, wood is susceptible to biological and physical degradation. Therefore it needs to be protected properly, all the more when using less durable species. A variety of finishes can be applied. These coatings must meet certain minimum requirements, among which are sufficient penetration, resistance to physical and biological discoloration, and good adhesion. The last is considered the utmost important factor for the overall performance of a coating. Without an adequate anchoring to the wood, the coating will peel off prematurely and, thus, affect the lifetime of the substrate. In this article, the impact of the type of coating used, the wood species, and preweathering of the wood on adhesion are disclosed. In addition, the effect of weathering on the wood-coating system as a whole is looked at as well. The adhesion measurements were obtained with a mechanical torque device developed at VTT in Finland. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3691 [article]

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Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering / Jan van den Bulcke in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 2 (06/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 2 (06/2008) . - p. 221-231 Titre : Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering Type de document : texte imprimé Auteurs : Jan van den Bulcke, Auteur ; Marc Stevens, Auteur ; Joris van Acker, Auteur Année de publication : 2008 Article en page(s) : p. 221-231 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Bois -- Revêtements protecteurs Bois extérieurs Brillance (optique) Essais accélérés (technologie) Pénétration (physique) Revêtement en phase solvant Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Several solvent- and water-borne exterior wood coatings were artificially weathered to study their performance behavior. Penetration and layer thickness were measured on unweathercd samples and compared to theoretical estimates by means of measured basic parameters of coating and substrate. Color, surface roughness, gloss, and adhesion were monitored during aging, and the latter two were also calculated and compared to their experimental values. Theoretical values of gloss, and especially those of adhesion, were less successful on an absolute scale, but were in accordance with practical values on a relative scale. The influence of solid content, drying speed, and viscosity on penetration depth manifested itself clearly both in theory and in practice. In general, solvent-borne coatings performed well, but some water-borne coatings also showed good performance. By measuring the characteristics of a coating as described in this article, it is possible to rank the coatings and follow their weatherability. Finally, calculation of theoretical values proved a promising method for initial screening purpose. DOI : 10.1007/s11998-007-9074-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9074-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2998 [article]

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Fungal disfigurement of exterior wood coatings : from subjective rating towards 3D/4D objectivity / Jan van den Bulcke in DOUBLE LIAISON, N° 566 (12/2008)

[article]  inDOUBLE LIAISON > N° 566 (12/2008) . - p. 18-23 Titre : Fungal disfigurement of exterior wood coatings : from subjective rating towards 3D/4D objectivity Type de document : texte imprimé Auteurs : Jan van den Bulcke, Auteur ; Joris van Acker, Auteur ; Imke de Windt, Auteur ; Marc Stevens, Auteur Année de publication : 2008 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The European Biocidal Products Directive (BPD) challenges the (wood) coating manufacturers to produce coatings with reduced amounts of biocides or even avoid using biocides. Moreover, coatings should also comply with the European VOC Solvents Directive, forcing the industry to switch to low/non-VOC constituents. Given this legislation, an integrated view on the interaction of coating-substrate-environment is essential if the performance of future coatings should enhance or at leat remain comparable adequate. Research concerning fungal deterioration of wood coatings is exactly in the scope of such an approach. In this work a modified version of the European standard blue stain test for coatings (EN152) is presented which is further complemented with testing in a contrallable environment, the so-called Fungal Control Unit (FCU). This test setup combines the advantage of accelerated artificial wethering, biological deterioration and mimicry of the outdoor situation. Both additional tests give complementary information on fungal susceptibility linkin them with outdoor infestation. Samples are analysed in 3D to acquire in-depth knowledge on fungal growth. In addition, 3D/4D X-ray sub-micron tomography and accompanying image processing is illustrated as a powerful non-invasive technique for coating research, visualizing at the same time coating, wood and fungus and linking their characteristics. Ultimately, combining fungal growth data with physicochemical information of the coating (film formation, UV degradation...) and wood (water absorption, nutrient content...) should lead to cyberfungal deterioration modelling in 4D supporting manufacturers in the development of the innovative 'green' coating. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3414 [article]

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